Tube bending tool



March 3, 1953 OLIN STOVER 2,630,033

NOW BY CHANGE OF NAME SMOKEY OLIN STOVER TUBE BENDING TOOL Filed July 1,1949 ENTOR. $1

NOW BY CHANGE OF NAME SMOKEY oLm s-rovsz Patented Mar. 3, 1953 TUBEBENDING TOOL OlinJStover, Washington, D. 0., now by change of nameSmokey Olin Stover Application'Julyl, 1949, Serial No. 102,562

1 Claim.

This invention relates a system and apparatus for bending tubing, and inparticular comprises an arrangement of marks on tubing benders and lineson the tubing whereby an operator of the bender can make perfect bendsin relation to one another on the tubing.

More specifically it is an object to provide a system of marks on thebender and lines on the tubing so that an inexperienced operator of thehand bender knows the proper position in which to place the tubing inthe bender in order to make 90 bends at right angles to one another,offsets, 45 bend and other types of bends normally used in installingtubing in construction work.

According to this invention an operator of a hand bender using thissystem could at the first attempt make perfect bends in tubing, therebysaving the time and material usually Wasted in training an operator tobend tubing by hand. Also, it reduces the amount of time it takes anexperienced operator using the old type of benders to make perfect bendsin tubing.

These and other objects and advantages I attain by the constructionshown in the accompanying drawing wherein, for the purpose ofillustration, I have shown a preferred embodiment of my invention andwherein:

Fig. l is a side view in horizontal elevation of the hand. bender with asection of tubing partly bent.

Fig. 2 is a front view of the hand bender with the two marks A and B onthe bender in the same plane and showing a cross section of the tubingin the bender.

Fig. 3 is a front cross sectional view of the hand bender taken on. line33 of Fig. 1 showing the aligned tubing before making an offset bend.

Fig. 4 is a bottom view of the hand bender showing the hook holdingmeans of the bender and the aligned tubing which when bent to the properangle makes a perfect offset in the tubing.

Fig. 5 is a cross sectional view of the tubing showing typical lines I,2, 3 and 4 circumferentially spaced 90 from one another for properbending of the tubing.

Fig. 6 is the left side view of the tubing in Fig. 5 and showing lines Iand 2 parallel and on the periphery.

Fig. '7 is a right side view of the tubing in Fig. 5 and showing lines 3and 4 parallel and on the periphery.

The bender may be of generally conventional construction and thatdisclosed herein is typical. It comprises a handle I0, to which isconnected the bender per se. The bender comprises a centralsubstantially hollow shaft-like receiving section II in which the handleIii is adapted to be inserted. At the base of section II ther isprovided a rim like arcuate portion I2 extending in opposite directionsfrom sectionI-I. A groove I3 is provided in the face of portion I2 andinto which the tubing to be bent is placed. Webs I4 and I5 extend fromsection II to portion I2 for the purpose of reenforcement. Extendingfrom web I5 is a hook means I6 adapted to encircle the tubing whenplaced in registry with the bender prior to a bending operation.

According to the system of the invention arrows, identified as A and B,or similar marks, are provided on web I5 at the end thereof abuttingroove I3 as shown in Fig. 3 and on the back of hook I6, as shown inFig. 4, respectively. Also, the tubing is marked along its length withparallel lines I, 2, 3 and 4, spaced ninety degrees from each otherabout the periphery of the tubing.

In making an offset type of bend, tubing is placed within the bender insuch manner that line I is in registry with arrow A and thus line 3 isin registry with arrow B. The tubing is then bent and rotated 180 and isaligned so that line I is in registry with arrow B. and line 3 witharrow A. The tubing is then bent back to the original angle.

From this description it is now believed apparent to one skilled in theart that the tubing can be bent to any desired angle or to any desiredconfiguration by the system of this invention.

For example, to make two bends at right angles to each other, place thetubing in the bender with arrow A. aligned with line I operating thebender until a 90 bend is formed. Then sliding the bender down therequired distance on the tubing, place arrow A of the bender on line 2for a 90 left, or line 4 for a 90 right, and proceed to form the bend asabove.

While only one type of hand bender and one size of tubing are shown inthe accompany drawing, this system of marks on the bender and lines onthe tubing are adaptable to any type of bender and any size tubing.

It becomes apparent from the foregoing description and drawing that thissystem saves considerable time in. the process of bending tubing, andthe lines on the tubing and marks on the bender are of considerable helpin making other difficult bends.

Obviously, a system of this character provides a cheap and easily madebend of all types with a minimum of experience and tools.

It will also be obvious that this construction is capable of somemodification without in any manner departing from the spirit of myinvention; I accordingly do not wish to be understood as limiting myselfto the particular arrangement herein disclosed except as herein claimed.

I claim:

A tube bender having an arcuate portion with a groove therein adapted toreceive the tubing to be bent and hook means for grasping the tubing,identification marks on the arcuate portion, identification marks on thehook means, said identification marks being located in the same bendingplane, for bending tubing having straight parallel lines extending alongthe length thereof and arranged about the outer periphery thereof,whereby said tubing is adapted for arrangement within said bender sothat at least one pair of lines 180 apart are in registry with saididentification marks prior to the tube bending operation.

OLIN STOVER.

REFERENCES CITED The following references are of record in the file ofthis patent:

Number 20 Number UNITED STATES PATENTS Name Date Lloyd Apr. 11, 1916Greenfield June 22, 1920 Jones Apr. 17, 1923 Webber Aug. 7, 1928 AllenMa 7, 1929 Johnson June 10, 1930 Johnson Aug. 12, 1930 Henry July 28,1931 Meighan May 24, 1932 Kepler Sept. 3, 1946 McIntosh Sept. 30, 1947Pearson Feb. 24, 1948 Lampert Dec. 21, 1948 Snyder Mar. 8, 1949 FOREIGNPATENTS Country Date Germany Jan. 15, 1926 France Oct. 13, 1941

